Some places were hand coding __attribute__s when macros in compiler.hh were available to do that job. Using the macros helps abstract away compiler specific details and should be used when possible. Change-Id: I94befebcfde2d673e874e9959588f69781bd9021 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35975 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>